X-71=9-X

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Solution for X-71=9-X equation:


Simplifying
X + -71 = 9 + -1X

Reorder the terms:
-71 + X = 9 + -1X

Solving
-71 + X = 9 + -1X

Solving for variable 'X'.

Move all terms containing X to the left, all other terms to the right.

Add 'X' to each side of the equation.
-71 + X + X = 9 + -1X + X

Combine like terms: X + X = 2X
-71 + 2X = 9 + -1X + X

Combine like terms: -1X + X = 0
-71 + 2X = 9 + 0
-71 + 2X = 9

Add '71' to each side of the equation.
-71 + 71 + 2X = 9 + 71

Combine like terms: -71 + 71 = 0
0 + 2X = 9 + 71
2X = 9 + 71

Combine like terms: 9 + 71 = 80
2X = 80

Divide each side by '2'.
X = 40

Simplifying
X = 40

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